High-Tech Exosuit Lets Scientist Divers Explore Underwater Canyons

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Remember that scene in "Aliens" where Sigourney Weaver's Ellen
Ripley dons a Power Loader exoskeleton to do battle with the evil
alien queen? Yeah, that was nothing.

Marine biologists and engineers have now developed a massive
Exosuit weighing 530 lbs. (240 kilograms) designed for ocean
depths down to 1,000 feet (305 meters) — another extreme
environment where no one can hear you scream.

Researchers will take the Exosuit on its maiden journey this
July, when they will use it to take samples and conduct imaging
studies of the animals that live in "The Canyons," a region off
the New England coast where the continental
shelf plunges to depths of more than 10,000 feet (3,050 m).
[ Dangers
in the Deep: 10 Scariest Sea Creatures ]

The one-of-a-kind Exosuit, on display at the American Museum of
Natural History (AMNH) now through March 5, measures 6.5 feet (2
meters) tall and is made of hard metal and other materials. The
pressurized suit has four 1.6-horsepower thrusters to propel the
diver up, down, forward, backward or to the side.

Additionally, the Exosuit — with an oxygen system that provides
up to 50 hours of life support — is equipped with a fiber-optic
tether that allows for two-way communication, oxygen and pressure
monitoring, and a live video feed.

The researchers on the July expedition will study
bioluminescence and
biofluorescence in the mesopelagic zone, found at 656 to
3,281 feet (200 to 1,000 m) below the ocean's surface, where
light is dim and pressure can be 30 times greater than at the
surface.

Bioluminescence is the light created by living organisms through
a chemical reaction in the creatures' bodies. Biofluorescence, on
the other hand, occurs when organisms absorb high-energy,
short-wavelength light (such as ultraviolet light), then re-emit
that light at a longer wavelength. This process makes the
organisms appear to glow with an eerie, colored light (often
green or red).

Billions of marine animals migrate vertically on a daily basis
from deep within the ocean's darkest abysses to the surface,
where they feed at night, only to drop thousands of feet back to
the depths before dawn. Scientists have called this mass
migration — known as diel vertical migration or DVM — the largest
migration on Earth.

Many of these migrating fish,
plankton and other animals have bioluminescent or
biofluorescent properties, but scientist have only studied them
with remote instruments or from samples found in trawl nets.

That's what makes the Exosuit a giant leap forward for marine
biologists, who have never before been able to study these
little-known organisms in their natural habitat.

"Our access to these deeper open-water and reef habitats has been
limited, which has restricted our ability to investigate the
behavior and flashing patterns of bioluminescent organisms, or to
effectively collect fishes and invertebrates from deep reefs,"
John Sparks, a curator in the American Museum of Natural
History's Department of Ichthyology, said in a statement. "The
Exosuit could get us one step closer to achieving these goals."

The July expedition will be a collaboration among several groups:
the J.F. White Contracting Company in Framingham, Mass., (which
owns the Exosuit), the AMNH, the John B. Pierce Laboratory at
Yale University, Baruch College-City University of New York, the
University of Rhode Island and Arizona State University.